var z = 5;
function outer() {
  var x = 0;
  console.log(y, x, z);
  // logs “undefined, 0, 5”. I am not within the same closure as y, but I am with x, z

  function inner() {
   var y = 1;
   console.log(x, y, z), // logs “0, 1, 5”. I am in the closure with x, y, and z.
  }
}